Harmful
algal
blooms
(HABs)
can
occur
in
freshwater
and
marine
environments,
caused
by
various
species
of
planktonic
algae
spanning
a
wide
taxonomic
range.The
occurrence
these
encompasses
diverse
array
organisms,
bloom
dynamics,
impact
mechanisms.There
are
two
primary
factors
that
lead
to
bloom:
natural
mechanisms
like
circulation,
relaxation
upwelling,
river
ow,
anthropogenic
inputs,
which
result
eutrophication.Unfortunately,
there
is
common
assumption
solely
responsible
for
recent
stagnant
waters
coastal
areas,
not
always
true.This
review
highlights
the
ecological
environmental
contributing
formation
development
blooms,
focusing
on
nutrient
enrichment,
temperature,
light
availability,
grazing
pressure.By
investigating
physiological
molecular
responses
bloom-forming
changing
conditions,
aims
provide
insights
into
uencing
size
duration
blooms.Ultimately,
it
contributes
developing
more
e
cient
management
mitigation
strategies
harmful
blooms.
Water,
Journal Year:
2024,
Volume and Issue:
16(2), P. 257 - 257
Published: Jan. 11, 2024
Spring
algal
blooms
in
mid–high-latitude
lakes
are
facing
serious
challenges
such
as
earlier
outbreaks,
longer
duration,
and
increasing
frequency
under
the
dual
pressure
of
climate
warming
human
activities,
which
threaten
health
freshwater
ecosystems
water
security.
At
present,
freeze-thaw
processes
is
key
to
distinguishing
spring
mid-
high-latitude
from
low-latitude
lakes.
Based
on
visualization
an
analysis
literature
WOS
database
during
2007–2023,
we
clarified
driving
mechanism
process
(freeze-thaw,
freeze-up,
thawing)
bloom
by
describing
evolution
nutrient
migration
transformation,
temperature,
lake
transparency
dissolved
oxygen,
physiological
characteristics
algae
between
shallow
deep
We
found
that
complex
phosphorus
transformation
frozen
period
can
better
explain
spring-algal-bloom
phenomenon
compared
nitrogen.
The
dominant
species
also
undergo
process.
On
this
basis,
response
future
change
has
been
sorted
out.
general
framework
“principles
analysis,
model
construction,
simulation
prediction,
assessment
management”
prevention
strategy
for
dealing
with
have
proposed,
would
like
provide
scientific
support
reference
comprehensive
control
freezing
thawing
processes.
Water Air & Soil Pollution,
Journal Year:
2024,
Volume and Issue:
235(10)
Published: Sept. 3, 2024
Abstract
Various
sources
of
pollution
have
been
assigned
as
contributing
to
the
Freshwater
Salinization
Syndrome
(FSS),
by
which
water
bodies
are
undergoing
concurrent
salinization
and
alkalinization.
In
many
urban
areas
that
receive
substantial
snowfall,
road
salt
application
has
ascribed
main
source
chloride
driving
FSS.
rural
areas,
however,
inorganic
(e.g.
chemical)
organic
manure)
fertilizer
applications
found
be
most
important
chloride.
Herein,
we
compared
daily
mean
concentrations
over
past
decade
time
between
Coldwater
Creek
Chickasaw
Creek,
two
tributaries
Grand
Lake
St.
Marys,
largest
reservoir
in
Ohio.
We
also
used
Weighted
Regressions
on
Time,
Discharge,
Season
(WRTDS)
analyses
visualize
trends
data
vs.
nitrate
levels
delineate
likely
for
streams.
increased
both
subwatersheds
37%
25%
could
apportioned
a
respectively.
Additionally,
was
animal
or
septic
sources,
while
fertilizers,
comparison
with
30%
42%
Creek.
Monitoring
assessing
salinized
streams
chemical
biological
quality
is
important,
particularly
since
FSS
become
increasingly
linked
declines
harmful
algal
blooms,
including
recent
upticks
Prymnesium
parvum
blooms)
expected
exacerbated
global
climate
change
precipitation
causing
runoff
from
land).
Cambridge Prisms Water,
Journal Year:
2024,
Volume and Issue:
3
Published: Dec. 27, 2024
Abstract
Hypereutrophic
Grand
Lake
St
Marys
(GLSM)
is
a
large
(52
km
2
),
shallow
(mean
depth
~
1.5
m)
reservoir
in
an
agricultural
watershed
of
western
Ohio
(USA).
GLSM
suffers
from
extensive
cyanobacterial
harmful
algal
blooms
(cHABs)
that
persist
much
the
year,
resulting
total
microcystin
concentrations
are
often
above
safe
contact
levels.
Over
two
summers
(2020
and
2021),
phosphorus
(P)
binding
agents
(alum
lanthanum/bentonite
clay
Phoslock,
respectively),
conjunction
with
P-binding
algaecide
(SeClear)
2021,
were
applied
to
3.24-ha
enclosure
mitigate
cHAB
activity
create
‘safe’
recreational
space
for
public.
We
evaluated
these
applications
by
comparing
(TP),
microcystin,
chlorophyll,
phycocyanin
within
adjacent
lake.
Some
evidence
short-term
reductions
TP,
observed
following
each
P
treatment,
but
all
parameters
rapidly
returned
or
exceeded
pre-application
levels
2–3
weeks
after
treatment.
These
results
suggest
in-lake
chemical
treatments
cHABs
unlikely
provide
long-lasting
benefits
semi-enclosed
areas
large,
shallow,
hypereutrophic
systems,
resources
may
be
better
toward
reducing
external
nutrient
loads
(P
nitrogen)
watershed.
Harmful
algal
blooms
(HABs)
can
occur
in
freshwater
and
marine
environments,
caused
by
various
species
of
planktonic
algae
spanning
a
wide
taxonomic
range.The
occurrence
these
encompasses
diverse
array
organisms,
bloom
dynamics,
impact
mechanisms.There
are
two
primary
factors
that
lead
to
bloom:
natural
mechanisms
like
circulation,
relaxation
upwelling,
river
ow,
anthropogenic
inputs,
which
result
eutrophication.Unfortunately,
there
is
common
assumption
solely
responsible
for
recent
stagnant
waters
coastal
areas,
not
always
true.This
review
highlights
the
ecological
environmental
contributing
formation
development
blooms,
focusing
on
nutrient
enrichment,
temperature,
light
availability,
grazing
pressure.By
investigating
physiological
molecular
responses
bloom-forming
changing
conditions,
aims
provide
insights
into
uencing
size
duration
blooms.Ultimately,
it
contributes
developing
more
e
cient
management
mitigation
strategies
harmful
blooms.
